1. State Key Laboratory of Drug Research and Center of Pharmaceutics; Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 P.R. China
2. School of Pharmacy; Shenyang Pharmaceutical University; Shenyang 110016 P.R. China
3. National Engineering Research Center for Nanomedicine; College of Life Science and Technology; Huazhong University of Science and Technology; Wuhan 430074 P.R. China
4. State Key Laboratory of Drug Research and Center for Drug Metabolism; Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 P.R. China